A holiday tradition is A CHARLIE BROWN CHRISTMAS and we pretty much have a Mad Man to thank for it. John Allen was a Don Draper at McCann-Erickson in the mid 60s. On behalf of Coca-Cola he was lobbying for Charlie Brown. It would be the first animated adaptation of Charles M. Schultz’s classic PEANUTS comic strip. But Allen had to really twist arms because in typical fashion, CBS hated